The Dark Knight. The Man of Steel. The Amazon Warrior. The three greatest heroes in the DC Universe unite when the threats to our planet are bigger than any one of them can handle. But now, the deadly White Mercy has Superman, Wonder Woman and Batman in its terrifying grasp! Who would dare to orchestrate this attack-and why? All will be revealed as the three most powerful heroes in the DC Universe fight for their very souls! Collects issues #1-6.